Triple

T1565841
Position Surface form Disambiguated ID Type / Status
Subject Tabora Region E33430 entity
Predicate traversedBy P225 FINISHED
Object Central Line railway
The Central Line railway is a major Tanzanian rail route that connects the coastal city of Dar es Salaam with the country’s central and western regions, serving as a key corridor for passenger and freight transport.
E177043 NE FINISHED

How this triple was built (4 steps)

Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.

NER Named-entity recognition gpt-5-mini
Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Central Line railway | Statement: [Tabora Region, traversedBy, Central Line railway]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Central Line railway
Context triple: [Tabora Region, traversedBy, Central Line railway]
  • A. Borders Railway
    Borders Railway is a Scottish rail line that reconnects Edinburgh with the Scottish Borders and Midlothian, serving as one of the longest new domestic railway lines built in the UK in recent decades.
  • B. Midland Railway
    Midland Railway was a major 19th- and early 20th-century British railway company that operated extensive routes across central and northern England and played a key role in the development of the UK rail network.
  • C. Hayes railway line
    The Hayes railway line is a suburban commuter rail route in southeast London that connects central London with the town of Hayes in the London Borough of Bromley.
  • D. Great Eastern Main Line
    The Great Eastern Main Line is a major railway route in England connecting London with key towns and cities in Essex, Suffolk, and Norfolk.
  • E. North Midland Railway
    The North Midland Railway was an early 19th-century British railway company that operated a key main line in the Midlands, later becoming part of the Midland Railway.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg Description generation gpt-5.1
Instruction
Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Central Line railway
Triple: [Tabora Region, traversedBy, Central Line railway]
Generated description
The Central Line railway is a major Tanzanian rail route that connects the coastal city of Dar es Salaam with the country’s central and western regions, serving as a key corridor for passenger and freight transport.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Central Line railway
Target entity description: The Central Line railway is a major Tanzanian rail route that connects the coastal city of Dar es Salaam with the country’s central and western regions, serving as a key corridor for passenger and freight transport.
  • A. Borders Railway
    Borders Railway is a Scottish rail line that reconnects Edinburgh with the Scottish Borders and Midlothian, serving as one of the longest new domestic railway lines built in the UK in recent decades.
  • B. Midland Railway
    Midland Railway was a major 19th- and early 20th-century British railway company that operated extensive routes across central and northern England and played a key role in the development of the UK rail network.
  • C. Hayes railway line
    The Hayes railway line is a suburban commuter rail route in southeast London that connects central London with the town of Hayes in the London Borough of Bromley.
  • D. Great Eastern Main Line
    The Great Eastern Main Line is a major railway route in England connecting London with key towns and cities in Essex, Suffolk, and Norfolk.
  • E. North Midland Railway
    The North Midland Railway was an early 19th-century British railway company that operated a key main line in the Midlands, later becoming part of the Midland Railway.
  • F. None of above. chosen

Provenance (5 batches)

The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.

Step Stage Batch ID Status When
creating Elicitation batch_69a885f11b048190935025a035302715 completed March 4, 2026, 7:20 p.m.
NER Named-entity recognition batch_69abb2308bec81909d1660934eff171b completed March 7, 2026, 5:05 a.m.
NED1 Entity disambiguation (via context triple) batch_69ad3719dfdc819085511f96f9f92dba completed March 8, 2026, 8:45 a.m.
NEDg Description generation batch_69ad37d59e94819085504ea25dfa8311 completed March 8, 2026, 8:48 a.m.
NED2 Entity disambiguation (via description) batch_69ad382b126c8190a308415bd6c4264b completed March 8, 2026, 8:49 a.m.
Created at: March 4, 2026, 7:27 p.m.